{
    "$schema": "https://json-schema.org/draft/2020-12/schema",
    "type": "array",
    "oneOf": [
        {
            "title": "Layer vector (layers)",
            "minItems": 4,
            "maxItems": 4,
            "anyOf": [
                {
                    "prefixItems": [
                        { "const": "layers" },
                        { "type": ["string", "null"] },
                        { "type": ["string", "null"] },
                        { "const": null }
                    ]
                },
                {
                    "prefixItems": [
                        { "const": "layers" },
                        { "type": ["string", "null"] },
                        { "const": null },
                        { "type": ["string", "null"] }
                    ]
                }
            ]
        },
        {
            "title": "Annotation vector (obs/var)",
            "minItems": 2,
            "maxItems": 2,
            "prefixItems": [
                { "enum": ["obs", "var"] },
                { "type": ["string", "null"] }
            ]
        },
        {
            "title": "Vector from a multi-dimensional annotation (obsm/varm)",
            "minItems": 3,
            "maxItems": 3,
            "prefixItems": [
                { "enum": ["obsm", "varm"] },
                { "type": "string" },
                { "type": "integer" }
            ]
        },
        {
            "title": "Graph vector (obsp/varp)",
            "minItems": 4,
            "maxItems": 4,
            "anyOf": [
                {
                    "prefixItems": [
                        { "enum": ["obsp", "varp"] },
                        { "type": "string" },
                        { "type": ["string", "null"] },
                        { "const": null }
                    ]
                },
                {
                    "prefixItems": [
                        { "enum": ["obsp", "varp"] },
                        { "type": "string" },
                        { "const": null },
                        { "type": ["string", "null"] }
                    ]
                }
            ]
        }
    ]
}